1. Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2. College of Material Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
3. Laboratory for Advanced Materials and Electron Microscopy, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
4. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
5. National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, China
6. Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany
7. National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
8. Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China